Polygons crossing the International Dateline

[Dave Weaver]

Is it possible for MapServer to display that crosses the International Dateline?

I have created a simple shapefile, with one square polygon (4 points, close
together, left and right points on opposite sides of the Dateline) and
MapServer always displays it crossing the Greenwich Meridian, not the
Dateline (i.e. one very, very wide rectangle).

Do I have to split the polygon into 2, or is there an easier way to do it?

Many thanks,
Dave.